Founded in 1980, Shanghai Prime Machinery Co., Ltd Export Dept.  has grown to become the largest fasteners manufacturer and exporter in China. We have an 83,000 square meter Export Processing Center, including a cold forming plant, heat treatment plant, plating plant, packing center, inspection center and a distribution logistics center. Our company specializes in foreign trade and is backed up by our own sound manufacturing. The foreign trade and manufacturing activities support and enhance each other and provide a unique competitive edge in the market.With over 26 years?experience, business connections have been set up with more than 530 overseas customers in 95 countries and regions around the globe.Our main products are: bolts, screws, nuts, machine screws, plain washers, spring lock washers, wood screws, tapping screws, chipboard screws, furniture screws, rivets, pins, keys and many other hardware products made of carbon steel, alloy & stainless steel, aluminum, brass or other special materials. For finishing, we provide: black oxide, zinc electroplating, phosphate, copper plating, mechanical galvanization, hot dip galvanization, Dacromet, and others. Our products are produced in conformity with DIN, ANSI, AS, BS, JIS, GB, ISO or any other standard or non-standard specifications or against our customers? special requirements, in grades 4.8, 6.8, 8.8, 10.9, 12.9,  A2-50,  A2-70, and A4-70.